/* ==========================================================================
   首页专属样式 home.css（仅 index.html，覆盖 site.css 的首页细节）
   --------------------------------------------------------------------------
   全局设计系统（配色/顶栏/导航/页脚/光标）见 assets/site.css；
   本文件只保留首页特有的：Hero、快捷入口、最新动态、研究方向、汉堡菜单。
   ========================================================================== */

/* ============ Hero ============ */
body[data-page="home"] .hero{
  position:relative;height:auto;min-height:calc(100vh - 64px);min-height:calc(100svh - 64px);
  overflow:hidden;display:flex;flex-direction:column;justify-content:center;align-items:center;
  text-align:center;background:
   radial-gradient(900px 480px at 50% -8%,rgba(99,102,241,.10),transparent 65%),
   radial-gradient(600px 340px at 88% 30%,rgba(168,85,247,.08),transparent 65%),
   radial-gradient(560px 320px at 10% 66%,rgba(56,189,248,.07),transparent 60%),
   var(--bg)
}
html[data-theme="dark"] body[data-page="home"] .hero{
  background:
   radial-gradient(900px 480px at 50% -8%,rgba(99,102,241,.18),transparent 65%),
   radial-gradient(600px 340px at 88% 30%,rgba(168,85,247,.14),transparent 65%),
   radial-gradient(560px 320px at 10% 66%,rgba(56,189,248,.10),transparent 60%),
   var(--bg)
}
body[data-page="home"] .hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
body[data-page="home"] .hero-overlay{position:absolute;left:0;right:0;bottom:0;height:140px;z-index:1;pointer-events:none;
  background:linear-gradient(to top,var(--bg),transparent)}
body[data-page="home"] .hero-content{position:relative;z-index:2;width:100%;max-width:980px;padding:110px 28px 96px}

/* 英文小标：12px 大写 · 3px 字间距 · #6366f1 */
body[data-page="home"] .hero-kicker{
  font:700 12px/1.4 "Inter",-apple-system,"Segoe UI",sans-serif;
  letter-spacing:3px;text-transform:uppercase;color:#6366f1
}
html[data-theme="dark"] body[data-page="home"] .hero-kicker{color:#a5b4fc}

/* 主标题：48px 粗体 · #1e293b */
body[data-page="home"] .hero-title{
  font-size:48px;line-height:1.16;margin:18px 0 12px;letter-spacing:.02em;font-weight:800;color:#1e293b
}
html[data-theme="dark"] body[data-page="home"] .hero-title{color:#f1f5f9}

/* 副标题：24px 品牌蓝 · 中等字重 */
body[data-page="home"] .hero-lead{font-size:24px;font-weight:600;letter-spacing:.02em;color:#4f46e5;background:none;-webkit-background-clip:initial;background-clip:initial}
html[data-theme="dark"] body[data-page="home"] .hero-lead{color:#a5b4fc}

/* 研究方向描述：16px · #64748b */
body[data-page="home"] .hero-desc{max-width:780px;margin:20px auto 0;color:#64748b;font-size:16px;line-height:1.9}
html[data-theme="dark"] body[data-page="home"] .hero-desc{color:#94a3b8}

/* 5 个标签 pill */
body[data-page="home"] .hero-chips{margin-top:30px;gap:12px}
body[data-page="home"] .hc{
  font-size:13.5px;padding:8px 18px;border-radius:99px;
  border:1.5px solid var(--line2);background:rgba(255,255,255,.7);color:var(--ink);
  box-shadow:0 2px 8px rgba(15,23,42,.04);transition:all .22s ease
}
body[data-page="home"] .hc:hover{
  border-color:var(--acc-line);background:var(--acc-dim);color:var(--acc);transform:translateY(-2px);
  box-shadow:0 8px 20px rgba(79,70,229,.14)
}
html[data-theme="dark"] body[data-page="home"] .hc{background:rgba(30,41,59,.6)}

/* CTA 按钮 */
body[data-page="home"] .hero-actions{margin-top:44px;gap:16px}
body[data-page="home"] .hero-btn{
  padding:14px 30px;border-radius:14px;font-size:15px;font-weight:600;
  border:1.5px solid var(--line2);background:#fff;color:#4f46e5;
  box-shadow:0 4px 14px rgba(15,23,42,.06);transition:all .24s ease
}
body[data-page="home"] .hero-btn:hover{transform:translateY(-2px)}
body[data-page="home"] .hero-btn.primary{
  background:var(--brand-grad);color:#fff;border-color:transparent;
  box-shadow:0 12px 30px rgba(79,70,229,.35)
}
body[data-page="home"] .hero-btn.primary:hover{filter:brightness(1.08);box-shadow:0 16px 38px rgba(79,70,229,.42)}
body[data-page="home"] .hero-btn .arr{display:inline-block;transition:transform .25s cubic-bezier(.22,1,.36,1)}
body[data-page="home"] .hero-btn:hover .arr{transform:translateX(5px)}
body[data-page="home"] .hero-btn:not(.primary){border-color:#c7d2fe;background:#fff;color:#4f46e5}
body[data-page="home"] .hero-btn:not(.primary):hover{background:#4f46e5;border-color:#4f46e5;color:#fff}
html[data-theme="dark"] body[data-page="home"] .hero-btn:not(.primary){background:transparent;color:#a5b4fc}

/* Hero 入场动画（逐条淡入上移） */
@keyframes heroRv{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
body[data-page="home"] .hero-kicker{animation:heroRv .7s .05s cubic-bezier(.22,1,.36,1) backwards}
body[data-page="home"] .hero-title{animation:heroRv .7s .12s cubic-bezier(.22,1,.36,1) backwards}
body[data-page="home"] .hero-lead{animation:heroRv .7s .19s cubic-bezier(.22,1,.36,1) backwards}
body[data-page="home"] .hero-desc{animation:heroRv .7s .26s cubic-bezier(.22,1,.36,1) backwards}
body[data-page="home"] .hero-chips{animation:heroRv .7s .33s cubic-bezier(.22,1,.36,1) backwards}
body[data-page="home"] .hero-actions{animation:heroRv .7s .40s cubic-bezier(.22,1,.36,1) backwards}

/* ============ 内容区通用 ============ */
body[data-page="home"] .home-wrap{max-width:1100px;margin:0 auto;padding:0 32px;position:relative;z-index:2}
body[data-page="home"] .hsec{margin-bottom:64px}
body[data-page="home"] .hsec-head{max-width:640px;margin-bottom:26px;text-align:left}
body[data-page="home"] .hsec-kicker{font:700 11px/1.4 "Inter","Space Grotesk",sans-serif;letter-spacing:.2em;color:#6366f1;text-transform:uppercase}
body[data-page="home"] .hsec-head h3{font-size:27px;font-weight:800;margin:8px 0 6px;color:var(--ink)}
body[data-page="home"] .hsec-head p{color:var(--sub);font-size:14px;line-height:1.8}

/* ============ 模块 A：快捷入口卡片（3 列） ============ */
body[data-page="home"] .qgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
body[data-page="home"] .qcard{
  display:flex;align-items:center;gap:16px;padding:24px;text-decoration:none;color:inherit;
  background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 1px 3px rgba(15,23,42,.05),0 10px 28px rgba(15,23,42,.05);
  transition:transform .25s cubic-bezier(.22,1,.36,1),box-shadow .25s,border-color .25s
}
html[data-theme="dark"] body[data-page="home"] .qcard{background:var(--glass)}
body[data-page="home"] .qcard:hover{
  transform:translateY(-6px);border-color:var(--acc-line);
  box-shadow:0 14px 34px rgba(79,70,229,.14),0 4px 10px rgba(15,23,42,.06)
}
body[data-page="home"] .qic{
  flex:0 0 auto;width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;color:#fff
}
body[data-page="home"] .qic .ic-svg{width:23px;height:23px}
body[data-page="home"] .qic1{background:linear-gradient(135deg,#4f46e5,#7c3aed);box-shadow:0 6px 16px rgba(79,70,229,.32)}
body[data-page="home"] .qic2{background:linear-gradient(135deg,#0ea5e9,#6366f1);box-shadow:0 6px 16px rgba(14,165,233,.30)}
body[data-page="home"] .qic3{background:linear-gradient(135deg,#8b5cf6,#d946ef);box-shadow:0 6px 16px rgba(139,92,246,.30)}
body[data-page="home"] .qinfo{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
body[data-page="home"] .qinfo b{font-size:16px;font-weight:700;color:var(--ink)}
body[data-page="home"] .qinfo small{font-size:12.5px;color:var(--sub);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
body[data-page="home"] .qgo{flex:0 0 auto;font-size:13px;font-weight:600;color:#4f46e5;display:inline-flex;align-items:center;gap:4px;white-space:nowrap}
html[data-theme="dark"] body[data-page="home"] .qgo{color:#a5b4fc}
body[data-page="home"] .qgo i{font-style:normal;transition:transform .25s cubic-bezier(.22,1,.36,1)}
body[data-page="home"] .qcard:hover .qgo i{transform:translateX(4px)}

/* ============ 模块 B：最新研究动态 ============ */
body[data-page="home"] .news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
body[data-page="home"] .news-grid .pub-card{
  display:flex;flex-direction:column;padding:22px;border:1px solid var(--line);border-radius:16px;
  background:#fff;text-decoration:none;color:inherit;
  box-shadow:0 1px 3px rgba(15,23,42,.04),0 10px 26px rgba(15,23,42,.04);
  transition:transform .25s cubic-bezier(.22,1,.36,1),box-shadow .25s,border-color .25s
}
html[data-theme="dark"] body[data-page="home"] .news-grid .pub-card{background:var(--glass)}
body[data-page="home"] .news-grid .pub-card:hover{transform:translateY(-5px);border-color:var(--acc-line);box-shadow:0 14px 32px rgba(79,70,229,.12)}
body[data-page="home"] .news-grid .pub-card h4{font-size:15.5px;line-height:1.5;margin-bottom:10px;color:var(--ink);font-weight:700}
body[data-page="home"] .news-grid .pub-card .meta{
  align-self:flex-start;font-size:11.5px;font-weight:600;color:#4f46e5;
  background:var(--acc-dim);border:1px solid var(--acc-line);border-radius:99px;padding:3px 11px;margin-bottom:12px
}
body[data-page="home"] .news-grid .pub-card p{font-size:13px;color:var(--sub);flex:1;line-height:1.75}
body[data-page="home"] .news-grid .pub-go{margin-top:14px;font-size:13px;font-weight:600;color:#4f46e5}
html[data-theme="dark"] body[data-page="home"] .news-grid .pub-go{color:#a5b4fc}

/* ============ 研究方向卡片（浅色化） ============ */
body[data-page="home"] .dir-card{
  border:1px solid var(--line);border-radius:18px;background:#fff;
  box-shadow:0 1px 3px rgba(15,23,42,.04),0 10px 26px rgba(15,23,42,.04);
  transition:transform .25s cubic-bezier(.22,1,.36,1),box-shadow .25s,border-color .25s
}
html[data-theme="dark"] body[data-page="home"] .dir-card{background:var(--glass)}
body[data-page="home"] .dir-card:hover{transform:translateY(-5px);border-color:var(--acc-line);box-shadow:0 16px 40px rgba(79,70,229,.13)}
body[data-page="home"] .dir-info h4{color:var(--ink)}
body[data-page="home"] .dir-info p{color:var(--sub)}
body[data-page="home"] .dir-link{color:#4f46e5}
html[data-theme="dark"] body[data-page="home"] .dir-link{color:#a5b4fc}

/* ============ 首页页脚三栏布局（外观见 site.css） ============ */
body[data-page="home"] .home-footer .pf-inner{grid-template-columns:1.6fr 1fr 1fr}

/* ============ 汉堡按钮 + 移动端抽屉（仅首页有） ============ */
.tb-burger{display:none;width:38px;height:38px;border-radius:11px;border:1px solid var(--line2);
  background:#fff;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;
  transition:border-color .2s,background .2s}
.tb-burger span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink);transition:transform .25s,opacity .2s}
.tb-burger:hover{border-color:var(--acc-line);background:var(--acc-dim)}
body.menu-open .tb-burger span:nth-child(1){transform:translateY(6px) rotate(45deg)}
body.menu-open .tb-burger span:nth-child(2){opacity:0}
body.menu-open .tb-burger span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.mob-nav{position:fixed;inset:0;z-index:60;display:none}
.mob-nav::before{content:'';position:absolute;inset:0;background:rgba(15,23,42,.35);backdrop-filter:blur(4px);opacity:0;transition:opacity .25s}
.mob-nav-panel{position:absolute;top:0;right:0;bottom:0;width:min(300px,84vw);padding:76px 18px 24px;
  background:#fff;box-shadow:-18px 0 50px rgba(15,23,42,.18);display:flex;flex-direction:column;gap:6px;
  transform:translateX(105%);transition:transform .32s cubic-bezier(.22,1,.36,1)}
body.menu-open .mob-nav{display:block}
body.menu-open .mob-nav::before{opacity:1}
body.menu-open .mob-nav-panel{transform:none}
body.menu-open{overflow:hidden}
.mob-nav-panel .nav-btn{width:100%;justify-content:flex-start;padding:13px 16px;border-radius:12px;font-size:15px}
html[data-theme="dark"] .mob-nav-panel{background:#0f172a}

/* ============ 平板（768–1024px） ============ */
@media (max-width:1024px) and (min-width:769px){
  body[data-page="home"] .hero-title{font-size:42px}
  body[data-page="home"] .hero-lead{font-size:22px}
  body[data-page="home"] .qgrid,body[data-page="home"] .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  body[data-page="home"] .dir-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ============ 移动端（<768px） ============ */
@media (max-width:768px){
  /* 顶栏：隐藏文字导航，显示汉堡 */
  body[data-page="home"] .nav-scroll{display:none}
  .tb-burger{display:flex}
  body[data-page="home"] .topbar{padding:0 14px;gap:10px}
  body[data-page="home"] .brand small{display:none}
  body[data-page="home"] .brand h1{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52vw}
  body[data-page="home"] .tb-reset:not(.tb-theme){display:none}

  /* Hero 缩小字号 */
  body[data-page="home"] .hero{min-height:auto}
  body[data-page="home"] .hero-content{padding:92px 20px 72px}
  body[data-page="home"] .hero-title{font-size:32px;margin:16px 0 10px}
  body[data-page="home"] .hero-lead{font-size:19px}
  body[data-page="home"] .hero-desc{font-size:14.5px}
  body[data-page="home"] .hero-chips{gap:9px;margin-top:24px}
  body[data-page="home"] .hc{font-size:12.5px;padding:7px 14px}

  /* CTA 全宽堆叠 */
  body[data-page="home"] .hero-actions{flex-direction:column;width:100%;max-width:340px;margin:36px auto 0;gap:14px}
  body[data-page="home"] .hero-btn{width:100%;justify-content:center}

  /* 卡片单列 */
  body[data-page="home"] .home-wrap{padding:0 18px}
  body[data-page="home"] .qgrid,body[data-page="home"] .news-grid,body[data-page="home"] .dir-grid{grid-template-columns:1fr}
  body[data-page="home"] .hsec{margin-bottom:48px}
  body[data-page="home"] .hsec-head h3{font-size:23px}

  /* 页脚单列 */
  body[data-page="home"] .home-footer{padding:34px 20px 0}
  body[data-page="home"] .home-footer .pf-inner{grid-template-columns:1fr;gap:24px}
}

/* ============ 减少动画偏好：停用 Hero 入场动画（光标见 site.css） ============ */
@media (prefers-reduced-motion:reduce){
  body[data-page="home"] .hero-kicker,body[data-page="home"] .hero-title,body[data-page="home"] .hero-lead,
  body[data-page="home"] .hero-desc,body[data-page="home"] .hero-chips,
  body[data-page="home"] .hero-actions{animation:none}
}